osborn



Aug. 28, 1928. v 1,682,237

H. C. OSBORN FOLDING MACHINE Filed Dec. 14, 1923 3 Sheets-Sheet 1 i731%; ykwrzzg Aug. 28, 1928. 4 1,682,237

H. C. QSBORN FOLDING MACHINE 3 Sheets-Sheet 2 Aug. 28, 1928.

.H. C. OSBORN Filed Dec. 14, 1923 FOLDING MACHINE 3 Sheets-Sheet 3 MMID/T026? Patented Aug. 28, 1928.

* UNITED STATES.

HENRY C. OSBORN, OF CLEVELAND, OHIO, ASSIGNOR TO THE AMERICAN MULTIGRAPHPATENT OFFICE.

COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

FOLDING MACHINE.

Application filed December 14, 1923. Serial No. 680,759.

and this has requred a cumbersome system of bevel gearing or othermechanism to drive the various parts.

I havediscovered that the machine may be much simplified by giving thesheet a quarter turn between the first and second' foldin s. This allowsall three folds to be made by parallel folding devices, enabling amaterial simplification of the driving mechanism as well as providing.for embodiment ina very compact machine.

I find that the paper can be turned about one corner thereof very simplyand efficiently by means of a coacting pa1r of conical rollers havingtheir apices (real or theoretical) at the corner of the sheet. Suchrolls operate to move the sheet about such corner as a center, the sheetclearing'the rolls when the quarter turn has been made.

A machine embodying the above mentioned features is illustrated in thedraw ings hereof, and is hereinafter more fully described, but it is tobe understood that I do not intend to limit myself to the particularconstruction there shown, as I believe I am entitled to broad protectionon the feature referred to of turning the paper between foldings. 1

In the drawings, Fig. 1 is a front elevation of an embodiment of mymachine; Fig. 2 is a vertical transverse section thereof; Fig. 3 is ahorizontal section adjacent the conical turning rolls as indicated bythe line 33 in Fig. 2; Fig. 4 is a horizontal section through themechanism shown for imparting the two parallel folds to the sheet, thesection being taken on an offset plane indicated by the line 4:& on Fig.2; Figs. 5 to 9, inclusive, indicate the condition of a sheet from itsunfolded form to the final or sixpanel fold; Fig, is a sectional' frontelevation of-a modified form of paper feed;

Fig. 11 is a section taken along the line 1111 on Fig. 10.

In the embodiment shown in the drawings,

10 and 11 indicate a pair of upright frame plates carr ing at their topsa horizontal table 12 a apted to support the sheets to be folded. Asmall pile of sheets is indicated at A in Figs? 1 and 2 resting on thetable 12 between suitable laterally adjustable guides 15 and 16. At therear of thetable I have shown suitable mechanism for transverselyfolding a sheet fed by hand toward the rear from the top of the pile.

The primary folding mechanism com prises an inclined buckle chute andthree rotatable rolls 21, 22 and 23. The roll 21 is constantly driven inthe direction to carry its lower portion toward the rear, that is.toward the buckle chute. The roll 23 is con stantly driven in the samerotative direct1on. The roll 22 bears against the roll 23 and is free torotate and hence is driven by 1 the roll 23 in the opposite direction tothe roll 21, thus'causing its upper portion to move toward the bucklechute. The roll 22 is ournaled in the arms of a pair ofbell cranks 25which are pivoted axially to the roll 23 and carry at their free endsrollers 26 bearing against cams 27 on a shaft 28, which is alsoconstantly rotated. A suitable spring 29 maintains the rollers 26 incontact with the cams.

It follows from the above described construction, that the roll 22 risesperiodically from the idle position shown in Fig. 2 into coaction withthe roller 21, and a short time thereafter drops to idle position. If,there fore, a sheet of paper A is shoved rearwardly by hand or otherwisepast the rolls 21 and 22 while they are separated the pinch of theserolls when brought together will advance the sheet up the buckle chuteuntil it is stopped by engaging the adjustably positioned abutment bar30 therein. This buckles the sheet at its free portion between the lowerend of the chute and the bite of the rolls 21 and 22, causing the sheetto double and pass downwardly, doubled edge foremost, between the rolls22 and 23. The sheet is thus transformed from the condition indicated atA Fig. 5 to that indicated at A in Fig. 6,

Beneath the primary folding mechanism described is shown a suitablevertical guide having for receiving the transversely folded sheet A Asshown, this guide comprises a series of vertical guide bars 40 and anendless belt 41 in front thereof, the belt being driven so that itsreach adjacent the guide bars travels downwardly. The transverselyfolded sheet is thus fed downwardly, doubled edge foremost, into thegrip of the turning mechanism, which will now be described.

and 51 in Figs. 1, 2 and 3 indicate-a pair of coacting conical rollershaving their meeting line in the plane of the advanced doubled sheet andsoformed and positioned that their theoretical apices meet at the edgeof the sheet as fed to these rollers. venience in supporting theseconical rollers, I omit their extreme portions. Both rolls may bedriven, but I find it suf icient to drive one of them and allow theother to rotate by frictional engagement therewith. As shown, these tworolls are mounted on shafts 52 and 53 which are journalled at theirouter ends in suitable skewed bearings 54 and 55 carried by the frameplate 10. Their inner ends are shown as mounted in bearings in suitablebearing brackets 57 secured to the frame plate 11. Beneath the conicalrolls isa vertical guide plate 60, and in front of this is an endlessbelt 61 which is constantly driven in the direction to carry its reachadjacent the plate downwardly.

The transversely folded sheet A descends, doubled edge foremost, intothe bite of the rolls 50 and 51 with one doubled corner of that sheet atthe theoretic apex of the conical rolls. Now the revolution of theserolls is in the direction to cause their adjacent portions to traveldownwardly so that the sheet is turned about one corner thereof untilthe doubled edge which was horizontal becomes vertical, the sheet thusthe position indicated at A in. Fig. 7.

A suitable guide is provided to align the turned sheet; This guide isshown as com prising an upright bar 65 laterally adjustable on' theplate and extending transversely through an opening in that plate. Thisbar is theoretically located directly in alignment with the common apexof the cones. The turnin of the sheet by the cones continues unti it hasbeen turned just ninety degrees, which frees it from the cones andbrings its doubled edge into engagement with the guide, and then passesdownwardly for the subsequent folds.

In practice, a slight adjustment of the guides 15 and 16 for theoriginal sheets may cause the paper to turn about a point which variesslightly from the exact corner, and then the-guide will be adjustedcorrespondingly, so that the turned sheet will pass downwardly with itsdoubled edge substanw tially in contact with. the guide 65, and in Forcon-- accurate registration for the subsequent allel folds 'may bevaried materially from that illustrate I find a very. simple arrangementis to employ two buckle chutes,

kni e'and roller folders. As shown in Fi 2 and 4, the transverselyfolded sheet escends vertically into the buckle chute against anadjustable stop bar 71 therein. This bar is ordinarily so positionedthat about one-third of the sheet passes into the chute. In front of theopen space between the guide plate 60 and buckle chute 70 are a pair ofcontacting rotating rolls 74 and 75 moving with their adjacent portionsforwardly, while coacting with the roll '75 is' a roll 76 which travelsin the opposite direction of rotation to that roll, so that theiradjacent surfaces travel downwardly. A suitable curved guide 78 leadsfrom the pass of the rolls 7 4 and 75 to the pass of the rolls 75 and76.

When the once folded sheet drops into the buckle chute 70 a suitableknife 80 moves forwardly and tucks the sheet into the bite of the rolls74 and 75 whereby it is given its firstilongi'tudinal fold. These rollsad- Vance the sheet forwardly and thence downwardly, so that .it is,delivered vertically downward by the rolls 75 and 76 in the con- .ditionshown'in A, Fig.8. The sheet in this condition travels downwardly alongthe guide plate 82 (by gravityiassisted by the separated rolls 83 and84) and is discharged into the buckle chute 90.. This chute has anadjustable stop bar 91, which is positioned so that the sheet having aonce folded panel stands about equally inthe chute and above the chute,thus brmgin its region where the final fold is to be ma e between thechute and the plate 82. Behind this open space is a knife 95 whichoperates to tuck the sheet into the bite of the folding rolls 96 and 97,

Which thus deliver the sheet forwardly in its final folded condition, asillustrated in A in Fig. 9.

I find it very simple to mount the two knives 80 and 95 on a singlereciprocating cross head and position the parts so that when the knife95 is acting on one sheet to give it its finalfold the knife 80 isacting on the succeedin sheet to give it its first parallel fold. Figs.2 and 4 illustrate such crosshead at 100. It is slideably guided in ways101 and 102 in the frame plates 10 and 11 respectively, and hasa pair ofarms 103 and 104 which carry rollers 105 and 106 bearing on cams 107 and108 ona rotating shaft 110. Suitable springs 112 (four being shown)maintain the rollers 105 and 106 in contact with their respective cams.

Theadjustment of the stop bar 71 about midway of the chute 70, as shownin Fig. 2, and the arrangement of "the conical rolls as shown, gives theordinary six-panel letter sheet fold, when the sheets lie face-up on thetable 12 with their bottom edges toward the buckle chute. Various otherfolds may be obtained, however, if desired. For instance, by setting thestop bar 71 near the bottom of the chute 70, the two parallel folds willbe in opposite directions, giving the sheet a fan fold. Or, should it bedesired to give the sheet one transverse and one longitudinal fold, toproduce the fourpanel fold sometimes desired for letter sheets, it isonly necessary to set the abut ment bar 71, so that the sheet is foldedin the middle, and remove the guide member 78, it being understood thatsuitable receiv ing or conveying mechanism might be attached to themachine at either pair of folding rolls.

Furthermore, either the six-panel or fourpanel fold ma; be in otherdirections, to cause other panels to beexposed (sometimes desired for.printed circular work) by interchanging the positions of the knives andparallel folders, or by reversing the conical rolls so that they turnthe sheet about the other doubled corner.

It will be noted that all of the rollers and shafts shown and describedwith the exception of the conical rolls and their shafts are parallelwith each-other and may thus be driven with very simple mechanism.Moreover, the simple expedient of a pair of bevel gears enables theconical rolls,to be driven from a gear axially parallel with saidshafts. Thus, I have shown a bevel gear 120 on the shaft 52 meshing witha bevel gear 121 which is rigid with a pinion 123, the gear 121 and itspinion being axially parallel with all of the other rolls.

The folding machine described adapts it- 'self for being driven by spurgearing and sprocket chains, for instance as follows:

As shown the shaft 110 may be considered the main shaft. It is shown asdriven by-a motor 130 from which a belt 131 runs over a pulley 132 onthe shaft 110. On this shaft is shown a sprocket wheel 135. A sprocket Ichain 136 runs from this wheel over the another chain 146 leads over asprocket wheel 147 on the shaft of the upper roller 148 for the belt 41.@n the shaft 139 of the roller 74 is shown a third sprocket wheel 150connected by a sprocket chain 151 with a' sprocket wheel 152 on theshaft 153 of the roller 96. The sprocket chains described accordinglydrive each of the parallel folding sets as well as the two feedingbelts.

As shown, the pinion 123 which drives the conical rolls meshes with agear 160 on p 4 the shaft of the belt roller 143. The roller- 21 of theprimary folder is shown as pro 'vided with a gear 17 0 meshing with agear 171 loose on the shaft carrying the roll 23 and this gear 171meshes with a gear 172 on the cam shaft 28. This same gear 172 mesheswith a pinion 173 on the shaft of the upper belt roller 148. On thissame belt. roll'er shaft is a gear 175 meshing with a gear 176 on theroller 23 for driving the lat ter.

It will thus be seen that the primary folding mechanism and the turningmechanism are all driven by spur gears from parts driven by the sprocketchain mechanism described. The entire driving mechanism is accordinglysimple and direct and not liable to get out of order and mayconveniently be mounted all on one side of the machine. It is to beunderstood, of course, that driving mechanism other than sprocket chainsmay be a employed. For instance, the arrangement of parallel shaftsshown adapts itself for driving by trains of spur gearing, if de sired.

Beneath-the buckle chute 20 in Fig. 2 is shown a table 13 al gning withthe table 12. By removing the buckle chute and the roller 21, a pile ofsheets may be placed on the tables 12 and 13 and the bottommost sheetfed autoniatically therefrom by the coacting rollers 22 and 23, which,by feeding inwardly the intermediate region of such sheet, may both foldand feed it.

The paper feeding mechanism shown in Figs. 10 and 11 may be used inplace of that shown in Figs. 1 and 2 in connection with the initialbuckle chute. The primary purpose of this form of feed is to moreaccurately align the paper to be folded.

I have rigidly secured a bar 200 in brackets 202 rising from the side;plates 10 and at I intervals along this bar I have adjustablv mountedbifurcated bearing brackets 203 for light individual rollers 204.These'brackets are slotted at 206 to receive the axle shafts of therollers, which construction allows them to rest lightly on the feed roll22 at,

all times. Thus, the paper may be urged up- Wardly along the inclinedbuckle chute with lltl sufiicient force to align the foremost edgeagainst the stop bar .30 and so hold it until the feed roll 22 is rockedupwardly by the cams'as 'hereinbefore explained. This upward rocking issufficient to bring the axle shafts of the individual rollers 204against the upper end of the slots 206 which positively pinches-thepaper and buckles it into the bite of the folding rolls 22 and 23. Ihave shown (the roll 23 preferably driven by the gear 176 .asbefore.while spur gears 207 and 208 indentical in pitch to the rolls 23 and24serve to positively connect these. rolls. It results that the fedsheet stops against the bar 30 thus stopping the rolls 204 while theroll 22 slides on the paper until it is rocked upward to pinch the paperand forcibly drive it forward.

Having thus described my, invention, I claim:

1. In a folding machine, the combination of mechanism for folding asheet and propelling it in a plane along a guideway without binding it,and mechanism for then giving the sheet a quarter turn in the sameplane.

2. In a folding machine, the combination with folding mechanism, of apair of conical rolls adapted to engage and turn a sheet, an open chutebetween the folding mechanism and rolls and occupied by said sheetduring thefirst portion of the turning, said chute comprising astationary guiding member and an adjacent traveling member unopposed onthe face adjacent the guiding member.

3. In a folding machine, the combination with a pair of foldingmechanisms, one adapted to act on the product of the other, a conveyorbetween the mechanisms including a belt lightly engaging the product andurging it forwardly and a pair of conical rolls adapted to engage thesheet from-the first folder while acted on by the conveyor and turn itin its own plane for delivery to the second folder.

4. In a ,folding machine, the combination with a paper guide, of meansfor lightly urging paper along said guide, a pair of co: acting conicalrolls adapted to turn a folded sheet in its own plane into parallelismwith said guide while still in contact with the urging means. I V

5. In a folding machine, the combination with paper propelling means anda plate adjacent thereto, the propelling means being free fromopposition on the face adjacent the plate, of a pair of coacting conicalrolls adapted to engage a sheet of paper and turn it while engaged bysaid propelling means.

6. The combination of a folding mechanism adapted to give a sheet onefold, a folding mechanism located parallel with the first mechanismandadapted to give the sheet another fold, a pair of coacting conicalrolls acting between said mechanism and serving to give the sheet aquarter turn in its own plane. afterleaving the first folder andbeforeengaging the second folder, and means including a belt lightlyengaging the paper betweentheconical rolls and said first fold- -ingmechanism for maintaining the alignof a, sheet and fold it, all of'saidrolls being mounted on parallel axes, and means addi tio'nalto saidfolding mechanisms to turn the folded sheet delivered by the firstfolder about a center and deliver it without fold-- ing it to the secondfolder, and means operating between the folders and turning means toguide and convey the paper toward and away from the turning means. 7

8. In a folding machine, the combination of a primary folder comprisinga buckle chute and a pair of coacting rolls, means controlled by theengagement of the paper with the stop of the buckle chute for aligningthe paper with the roll, a pair of coacting conical rolls adapted to acton the sheet delivered by the primary fol er and give such sheet aquarter turn, and a'secondar folder acting on the turned sheet.

9. In a folding machine, the combination with a primary folding device,of a belt unopposed on its active face and adjacent a guide foradvancing the once folded sheet, a pair of conical rolls for givingsuchsheet a quarter turn, and means for thereafter giving the sheet asecondary fold.

10. In a folding machine, the combination of a table for paper, anadjacent buckle chute, folding rolls coacting with the buckle chute tofold a sheet transversely, means for advancing such folded sheet, a pairof conical rolls adapted to give the sheet a quarter turn in its ownplane, means for advancing such turn'ed sheet, and an adjustable stopfor limiting the advance of the sheet, and rolls and 'a tucking knifefor giving the sheet a secondary fold.

11. In a folding machine, the combination with two parallel folders, ofa pair of coacting rotatable cones adapted to act on a sheet after itsdischarge from the first folder and before it enters the second folder,an open chute between the first folderand the cones comprising astationary plate, and a belt having a reach parallel with the plate andadjacent to it and unopposed on its paper engaging face, andmeans'in'cluding a side guide for engaging an edge of the sheet toalign" it after leaving said cones.

12. The combination of a pair of folding mechanisms parallel with eachother, a pair of coacting cones located intermediately of the foldersand adapted to turn thelfolded law sheet delivered from the first folderto present it to the second folder, an open chute between the firstfolder and the cones comprising a stationary plate, and a belt having areach parallel with the plate and adjacent to it ahd unopposed on itspaper engaging face, and an edge guide substantially at right angles-tothe plane in which the cone axes lie, saidguide being adapted toposition the sheet discharged by the conical rolls.

v 13. In a folding machine, the combination of a pair of coactingrotatable cones having a common theoretic apex, means for delivering tothe cones a folded sheet with one edge thereof substantially in linewith said apex,

. said means comprising an open chute, one rolls carrying the belts andthe conical rolls,

member of which travels and is unopposed whereby all of such parts aresimultaneously on its paper engaging face, and a guide subrotated, andthe mechanism connecting the stantially in line wtih said apex adaptedto knife with said mechanism whereby the act on the sheet'delivered bythe cones. knife is reciprocated. 14. In a folding machine, thecombination '18. In a folding machine, the combination of folding rollsadapted to fold a sheet interof a buckle chute, a pair of folding rOllSinto mediately and deliver it along an open chute the bite of which thesheet may be buckled, comprising a guiding member and an unand means forpositioning the sheet in the opposed belt parallel therewith, a pair ofchute without causing it to buckle. coacting cones having their meetinglines 19. In a folding machine, the combination substantially in theplane of said guide, of a buckle chute, a pair of folding rolls, wherebythe folded sheet discharged from means foradvancing the sheet into thechute the primary folder may be given a quarter with sufficient force tocause it to buckle into turn in its own plane, a guide leading from thebite of such rolls, and means for advancthe cones in substantially thesame plane as ing the sheet in the chute to position it but the firstmentioned guide, a receiving chute without sufficient force to buckleit. aligned with said plane for receiving the 20. The combination of abuckle chute, a folded and turned sheet, anda blade adapted pair offolding rolls, a third roll with which to act on the sheet in said chuteand tuck it one of the pair may coact to buckle the sheet into the biteof a pair of foldingrolls. in the chute into the bite of the pair and15. In a folding machine, the combination means for shoving the sheetinto the chute of a buckle chute and a group of rolls with sufficientforce to position it without adapted to form a primary fold in a sheet,buckling it. an endless belt and a guide for delivering 21. Thecombination with a buckle chute such folded sheet, a pair of coactingcones and folding rolls, of positioning rolls adapthaving their passregistering with the pased to act on the sheet to 'feed it against asageway between the belt and guide and havstop without buckling it, andmeans for ing their common theoretic apex substanthereafter buckling thesheet. tially in the line of one edge of the sheet, a belt and guideproviding a passageway on of a pair of rolls adapted to force a sheetthe other side of said conical rollers sublightly against a stop in thechute to true it stantially in the plane of the pass between withoutbuckling it, and means for causing them, and one or more groups ofrollers for said rolls to thereafter pinch the sheet to giving one ormore subsequent folds to the buckle it. sheet after delivery by saidsecond belt. 23. The combination with a buckle chute,

ltL-In a folding machine, the combination of a feeding roll and a set ofindividual truof a paper table, laterally adjustable edgev ing rollsresting lightly thereon adapted to guides thereon, a primary foldingdevice, coact therewith to feed the sheet against the comprising abuckle chute and a group of stop to true it, and means for thereafterrolls, a pair of coacting cones adapted to causing said rolls to pinchthe sheet to push act on such delivered sheet.'

engage the folded edge of the once folded it against the stop to buckleit. sheet delivered from the primary folder and 24. In a foldingmachine, the combination give such sheet a quarter turn in its own witha buckle chute, of arot'atable and bodiplane, an adjustable edge guideadapted to ly shiftable feeding roll and a positioning position thesheet delivered bythe cones, roll coacting therewith and resting lightlyand a secondary folding device adapted to thereon when the feeding rollis in one position, said positioning roll being adapted to 17. In afolding machine, the combinaoppose the bodily movement of the feed--tion of a paper table, a primary folder coming roll when it is shiftedand thus COttt't prising a buckle chute and a group of rolls with it topositively feed a sheet into the adapted to fold a sheet intermediately,a belt chute and buckle it. for advancing the sheet, a pair of coacting25. In a folding machine,.the combination cones to act on the advancedsheet, said cones of a primar folder adapted to fold a sheet havingtheir common theoretic apex subtransversely, mechanism adapted to actthen stantially in line with one edge of the sheet, on a sheet to giveit a quarter turn in its own a guide substantially in the same line forplane, two subsequent folders each parallel positioning the sheet turnedby the rolls, with thefirst folder and adapted to act on means foradvancing such turned sheet, a the once folded sheet to give it twoparallel chute for receiving it, agroup of folding folds one after theother, said subsequent.

rolls adjacent the mouth of the chute on folders being so related thatwhile the last one side thereof, a knife on the other side, folder isacting on one sheet the preceding two groups of folding rolls beingparallel folder is acting on the succeeding sheet. with each' other,power mechanism geared 26. In a folding machine, the combinawith'tliefoldlng rolls of both groups, the tion with a primary folder, ofmechanism 22. The combination with a buckle chute,

' rolls and a blade adapted to give two parallel folds to thetransversely, folded .sheet, said secondary folders being so mutuallypositioned that when one blade is giving the final fold to the foremostsheet the other blade is giving the first parallel fold to thesucceeding sheet.

27. In a folding machine, the combination of two foldersactingsimultaneously on. different sheets and successively on the same sheet,each folder comprising two rolls and a blade, and a reciprocating crosshead carrying both blades.

28. In a folding machine the combination of a primary folder adapted togive one fold to a sheet and two secondary folders adapted to give theonce folded sheet two additional folds parallel to eachother and atright angles to the first fold, said secondary folders each comprising apair of rolls and a blade and means including a movable member carryingboth blades for simultaneously i two secondary folders adapted to givethe once folded sheet two additional folds parallel.to each other and atright angles to the first fold, said secondary folders being parallelwith each other and facing in the same direction and each comprising apair of rolls and a blade, a cross-head carrying both blades, and meansfor reciprocating the cross-head, said secondary folders being so' setand so related to the control of the periodic action of the primaryfolder that the blades will operate simultaneously in different regionson successive sheets folded and delivered from the primary folder.

30. In a folding machine the combinatio wl h a periodically actingprimary folder of two secondary folders acting simultaneously'ondifferent sheets and successively on-the same sheet, each foldercomprising two rolls and a blade, and a single member carrying andreciprocating both blades. g 31. In a folding machine, the co-mbinaetion of mechanism for giving the sheet av fold in one direction,mechanism for giving the sheet a quarter turn, inits own plane after ithas left the first folder, and while maintaining it in the plane inwhich it is delivered from the first folder, and mecha- 11115111 forgivingthe sheet another fold at ri ht angles to the first fold after ithas folded by the other, means to deliver such sheet from one to theother and cause it to travel along a substantially true plane, means toturn said sheet substantially in said plane while being delivered, eachfolding mechanism acting to fold "and deliver the paper while moving allparts of the sheet along respective planes normal to said firstmentioned plane.

34. In a folding machine, two folding mechanisms each arranged to foldand deliver a sheet while moving it in a path parallel to theside edgesof the sheet, and means intermediate of said mechanisms for turning thefolded sheet while maintaining all portions thereof substantially in oneplane during such turning.

35. In a folding machine, two sets of cylindrical folding rollsinaxially parallel relation, means for delivering a once folded.

sheet from one'to the other, and means operating on such folded sheet asit is being delivered for turning .it substantially 90 in its own plane.

36. In a folding machine,,a folding device comprising cylindricalfolding rolls,

anotherfolding device comprising cylindrical folding rolls with theiraxes substantial-- ly parallel to the axis of the first named rolls,means for guiding a folded sheet from one device to the other whilemaintaining it in one plane, and means acting on the foldedsubstantially 90.

37. In a folding machine, the combination of two folding mechanisms eachcomprising a pair of folding rolls, and means forcausing the same to acton an intermediate region of a sheet and fold it, all of said rollsbeing mounted on parallel axes, and means additional to said foldingmechanisms to turn HENRY 0.}OSBORN.

in: sheet while it is so delivered for turning it

